PHP Syntax Questions and Answers

This set of PHP Multiple Choice Questions & Answers (MCQs) focuses on “Syntax – 2”.

1. What will be the output of the following PHP code?

```
<?php
```
```
/*
```
```
echo "Hello world";
```
```
*/
```
```
?>
```

a) Hello world
b) Nothing
c) Error
d)

/*
Hello world
*/

View Answer

Answer: b
Explanation: /* */ is used for commenting multiple lines.

2. What will be the output of the following PHP code?

```
<?php
```
```
$color = red;
```
```
echo "$color" . red ;
```
```
?>
```

a) red red
b) red
c) error
d) nothing
View Answer

Answer: c
Explanation: Use of undefined constant red.

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3. What will be the output of the following PHP code?

```
<?php
```
```
$color1 = red;
```
```
$color2 = green;
```
```
echo "$color1"."$color2";
```
```
?>
```

a) red green
b) red
c) green
d) error
View Answer

Answer: d
Explanation: It has to be $color1 = “red”; and $color2 = “green”; therefore the error.

4. What will be the output of the following PHP code?

```
<?php
```
```
$color = "red";
```
```
$color = "green";
```
```
echo "$color";
```
```
?>
```

a) red
b) green
c) red green
d) error
View Answer

Answer: b
Explanation: The variable contains the last value which has been assigned.

5. What will be the output of the following PHP code?

```
<?php
```
```
$color1 = "red";
```
```
$color2 = "green";
```
```
echo "$color1" . "$color2";
```
```
?>
```

a) red
b) green
c) red green
d) redgreen
View Answer

Answer: d
Explanation: The . operator is used to join to strings.

6. What will be the output of the following PHP code?

```
<?php
```
```
$color1 = "red";
```
```
$color2 = "green";
```
```
echo "$color1" + "$color2";
```
```
?>
```

a) redgreen
b) red green
c) 0
d) error
View Answer

Answer: c
Explanation: + operator does not join both the strings.

7. What will be the output of the following PHP code?

```
<?php
```
```
$color1 = "red";
```
```
$color2 = "red";
```
```
echo "$color1" + "$color2";
```
```
?>
```

a) redgreen
b) red green
c) 0
d) 1
View Answer

Answer: c
Explanation: + does not return 1 if the variables are equal.

8. What will be the output of the following PHP code?

```
<?php
```
```
$color1 = "red";
```
```
$color2 = "1";
```
```
echo "$color1" + "$color2";
```
```
?>
```

a) red1
b) red 1
c) 0
d) 1
View Answer

Answer: d
Explanation: + just returns the numeric value even though it is inside double quotes.

9. What will be the output of the following PHP code?

```
<?php
```
```
$color1 = "1";
```
```
$color2 = "1";
```
```
echo "$color1" + "$color2";
```
```
?>
```

a) 11
b) 2
c) 0
d) 1
View Answer

Answer: b
Explanation: + can be used to add to integer values which are enclosed by double-quotes.

10. What will be the output of the following PHP code?

```
<?php
```
```
$color1 = "red";
```
```
$color2 = "1";
```
```
$color3 = "grey"
```
```
echo "$color1" + "$color2" . "$color3";
```
```
?>
```

a) 1grey
b) grey
c) 0
d) red1grey
View Answer

Answer: a
Explanation: + gives the value 1 and . is used to give join 1 and grey.

Sanfoundry Global Education & Learning Series – PHP Programming.

To practice all questions on PHP Programming, here is complete set of 1000+ Multiple Choice Questions and Answers on PHP.

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